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integrate and link lib curl for android, add VAO support for brush draw, sync canvas with screen redraw instead of input events

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This commit is contained in:
omigamedev
2017-03-28 20:25:23 +01:00
parent 291ba7ae78
commit 675e0148ec
11 changed files with 85 additions and 33 deletions
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83
engine/brush.h
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@@ -34,6 +34,7 @@ class BrushMesh
public:
ui::Shader shader;
GLuint buffers[3]{ 0 };
GLuint vao{ 0 };
struct vertex_t { glm::vec4 pos; glm::vec2 uvs; };
struct instance_t { glm::mat4 mvp; float flow; };
int loc_flow;
@@ -95,21 +96,60 @@ public:
loc_flow = shader.GetAttribLocation("a_flow");
loc_mvp = shader.GetAttribLocation("a_mvp");
#if USE_VBO
glGenVertexArrays(1, &vao);
if (!vao)
return false;
glBindVertexArray(vao);
glEnableVertexAttribArray(0);
glEnableVertexAttribArray(1);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffers[1]);
glBindBuffer(GL_ARRAY_BUFFER, buffers[0]);
glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (GLvoid*)offsetof(vertex_t, pos));
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (GLvoid*)offsetof(vertex_t, uvs));
glBindBuffer(GL_ARRAY_BUFFER, buffers[2]);
// Loop over each column of the matrix...
for (int i = 0; i < 4; i++)
{
// Set up the vertex attribute
glVertexAttribPointer(loc_mvp + i, 4, GL_FLOAT, GL_FALSE, sizeof(instance_t),
(GLvoid*)(offsetof(instance_t, mvp) + sizeof(glm::vec4) * i));
// Enable it
glEnableVertexAttribArray(loc_mvp + i);
// Make it instanced
glVertexAttribDivisor(loc_mvp + i, 1);
}
glEnableVertexAttribArray(loc_flow);
glVertexAttribPointer(loc_flow, 1, GL_FLOAT, GL_FALSE, sizeof(instance_t),
(GLvoid*)offsetof(instance_t, flow));
glVertexAttribDivisor(loc_flow, 1);
glBindVertexArray(0);
#endif
return true;
}
void draw(const std::vector<StrokeSample>& samples, const glm::mat4& proj)
{
std::vector<instance_t> attributes;
attributes.reserve(samples.size());
for (const auto& s : samples)
{
auto mvp = proj *
glm::translate(glm::vec3(s.pos, 0)) *
glm::scale(glm::vec3(s.size, s.size, 1)) *
glm::eulerAngleZ(s.angle);
attributes.emplace_back(instance_t{ mvp, s.flow });
}
std::vector<instance_t> attributes;
attributes.reserve(samples.size());
for (const auto& s : samples)
{
auto mvp = proj *
glm::translate(glm::vec3(s.pos, 0)) *
glm::scale(glm::vec3(s.size, s.size, 1)) *
glm::eulerAngleZ(s.angle);
attributes.emplace_back(instance_t{ mvp, s.flow });
}
#ifdef USE_VBO
glBindBuffer(GL_ARRAY_BUFFER, buffers[2]);
glBufferData(GL_ARRAY_BUFFER, (int)(sizeof(instance_t) * attributes.size()), attributes.data(), GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindVertexArray(vao);
glDrawElementsInstanced(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, 0, (int)samples.size());
glBindVertexArray(0);
#else
glEnableVertexAttribArray(0);
glEnableVertexAttribArray(1);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffers[1]);
@@ -124,16 +164,16 @@ public:
glBindBuffer(GL_ARRAY_BUFFER, buffers[2]);
glBufferData(GL_ARRAY_BUFFER, (int)(sizeof(instance_t) * attributes.size()), attributes.data(), GL_STATIC_DRAW);
// Loop over each column of the matrix...
for (int i = 0; i < 4; i++)
{
// Set up the vertex attribute
glVertexAttribPointer(loc_mvp + i, 4, GL_FLOAT, GL_FALSE, sizeof(instance_t),
(GLvoid*)(offsetof(instance_t, mvp) + sizeof(glm::vec4) * i));
// Enable it
glEnableVertexAttribArray(loc_mvp + i);
// Make it instanced
glVertexAttribDivisor(loc_mvp + i, 1);
}
for (int i = 0; i < 4; i++)
{
// Set up the vertex attribute
glVertexAttribPointer(loc_mvp + i, 4, GL_FLOAT, GL_FALSE, sizeof(instance_t),
(GLvoid*)(offsetof(instance_t, mvp) + sizeof(glm::vec4) * i));
// Enable it
glEnableVertexAttribArray(loc_mvp + i);
// Make it instanced
glVertexAttribDivisor(loc_mvp + i, 1);
}
glEnableVertexAttribArray(loc_flow);
glVertexAttribPointer(loc_flow, 1, GL_FLOAT, GL_FALSE, sizeof(instance_t),
(GLvoid*)offsetof(instance_t, flow));
@@ -150,6 +190,7 @@ public:
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
#endif // USE_VBO
}
};